Padlock



` in an unlocked state.

srs

T rio.

J. J. HIRSCHBHL, OF LOUISVILLE, KENTUCKY.

PADLOCK.

To all whom 'it may concern:

` Be it known that I, J. J. HiRscriBm., of Louisville, in the county of Jeierson and State of Kentucky, have invented a new and Improved Padlock; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specication, in which- Figure 1 is a section of my invention, taken in the line a", a2, Fig. 2. Fig. 2, an internal view of the same, showing the lock Fig. 3, an internal view of the saine, showing the lock in a locked state. Figs. 4 and 5, internal views of the same, with portions of the parts detached. Fig. 6, a detached sectional view of the key. Figs. 7, 8, 9, and l0, views of detached parts of the invention.

Similar letters of reference indicate corV responding parts in the several figures.

The object of this invention is to obtain a padlock that will be unpickable and still comparatively simple in construction, and one that may be constructed at a moderate cost.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A, represents the case of the lock which may be of the usual padlock form, and B, is the bow or shackle which is secured at one end iii the upper part of the lock by a pivot a. The free or disengaged end of the bow or shackle has an eye or opening made throug'li it as usual.

Within the case A, of the lock there is placed a series of tuinblers C. These tumblers are all placed on a common axis b, and each tumbler is provided with a pendant c, see Fig. 10, and has a spring d, bearing on its upper surface. The springs ci, keep the front ends of the tuinblers C, down on a dog D, which is fitted on a pivot or bolt e. This dog at its front endhas a lateral projection f, on which the tumblers bear. The proj ection j', is shown clearly in Fig. 9.

E, is a dog which is placed on the saine pivot or bolt e, as the dog D. This dog E, is provided with a pendant g, and has a notch z, at each end. The dog D, also has a pendant z', at its front end and a notch j, at its back part, see Fig. 8.

The back part of the bow or shackle B, extends down a short distance below its pivot c, and `has a pin k, projecting laterally from it, said pin iitting in the notch 71, at the back part of the dog E, when the lock is in a locked state, see Fig. 8, a pin c, on a dog F, fitting in the front notch.

F, is a dog the lower end lof which is fitted loosely on a pin or pivot lex. This dog F, has a projection Z, at its front side which projection serves as a bolt and fits into the eye of the bow or shackle when the latter is locked, see Fig. 3. A projection m also eX- tends from the back side of the dog F, and is directly in front of the projection f, of dog D, when the lock is in a locked state.

To the dog F, there is attached a slide G, which is fitted in a recess in the back plate of the case. This slide is provided with tivo notches a, n', at its back end in one of which n, a guide pin o, of the back plate of the case fits. In the back plate of the lock case there is fitted a circular plate g, said plate having a curved slot r, made in it which slot is directly over the notch n, of the slide G.

IFI, -is a spring which bears against the back end of the bow or shackle B, and I, is a spring which bears against the dog F.

J, is the key of the lock. This key is provided with bits s, of varying lengths to suit the different tuinblers C, or rather their pendants @,and in the outer end of the bitplate there is fitted a pin t, which may be described as being of the form of a crank, a spiral spring u, being on its inner part within the bit-plate, said spring having a tendency to keep the outer end of the bit forced out from the end of the bit-plate, as shown clearly in Fig. 6.

The slide Gr, has a spring u, bearing upon it and to the outer end of the slide there is attached by a joint i), an upright arm fw. To the bow or shackle B, there is attached a slide a', the use of which will be presently shown.

The operation is as follows. Suppose the lock to be in a locked state, as shown in Fig. 3. The key J, when inserted in the lock is turned from right to left and the bits s, of the key first act against the tumblers C, and raise them from the projection f, of the dog D. The dogs D, E, are then acted upon by the key, the dog D, having its projection f, moved above the projection m, at the back of the dog F, and its back end moved down so that the notch y', will be free from the back end of the bow or shackle B.

The dog E, also has its end thrown free from the pins 7c, le. The pin t, of the key J, at this point enters the slot r, ofplate g, and catches into the notch n, of slide Gr, and throws back the slide, and the dog F, will consequently be thrown back, its projection Z, being drawn from the bow or shackle and the latter having its disengaged end thrown out of the lock case A, by the spring H.

'When the lock is locked the slide a, is shoved down by hand soas to depress the arm fw, and the outer end of slide G, the inner end of the latter being thereby thrown up above slot r, so that a person unacquainted with the lock would be unable to act upon slide G, and throw back the dog F.

From the above description it will be seen that the bow or shackle B, is secured at both ends and a very secure lock obtained and also a very simple and economical one compared with ordinary burglar proof locks, the majority of which are very complicated and expensive.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent; is,

l. The employment or use of the dogs D, E, F, and slide Gr, when combined and arranged with the bow or shackle B, substantially as shown so as to secure both ends of the same.

2. The employment or use of the pin t, placed in the bit-plate of key J, and used in connection with the slotted plate g for the purpose of actuating the slide G, as set forth.

3. The arm fw, attached to the outer end of the slide Gr, in combination with the slide a, on the bow or shackle for the purpose of throwing the notch a, of slide G, out of the reach of the pin t, of the key J, as set forth.

J. J. HIRSGHBHL.

llitnesses z Jos. CLEMENT, JNO. M. FARRAR. 

